We propose to study the effect of varying levels (frequency and intensity) of reminders on the sustainability of a mobility innovation by healthcare aides. Frequency: Our Alberta Health Services collaborators advised that monthly modification of the paper reminders would be frequent yet feasible while aligning with the rhythm of other monthly managerial responsibilities; in contrast, every three months would be infrequent but would align with quarterly managerial responsibilities. Intensity: They agreed that paper-based reminders are low intensity and commonly used in clinical settings. For the high intensity reminder they favored a socially-based "peer reminder". To summarize, the level of reminders will vary in frequency (monthly versus every three months) and intensity (paper reminders versus paper reminders + peer reminders).